DeVilbiss IntelliPAP Series White Ultrafine Intake Filter 4-Pak

• 1 11⁄16" x 1 3⁄16" disposable fine-particulate filter.
• 4-pack of filters

Depending on the quality of the air around your CPAP or BIPAP machine, these filters should be changed out about every 4-6 weeks. These filters are not washable.